[Jprogramming] Re : Sigma notation

[R.E. Boss]

http://www.matematica.net/portal/e-books/Graham%20-%20Knuth%20-%20Patashnik%20-%20%20Concrete%20Mathematics.pdf
errata on http://www-cs-faculty.stanford.edu/~uno/gkp.html


R.E. Boss


> -----Oorspronkelijk bericht-----
> Van: programming-bounces at forums.jsoftware.com [mailto:programming-bounces at forums.jsoftware.com] Namens Joey K Tuttle
> Verzonden: zaterdag 22 december 2012 8:49
> Aan: programming at jsoftware.com
> Onderwerp: Re: [Jprogramming] Re : Sigma notation
> 
> Another good reference on notation is the Graham - Knuth - Patashnik
> book CONCRETE MATHEMATICS a Foundation for Computer Science  and the
> associated Concrete Math Companion by Ken Iverson. Chapter two of the
> respective books are on summation and notation.
> 
> The Iverson book is available to read in the j wiki - the other one for
> around $25 used, or perhaps at a library.
> 
> On 2012/12/21 23:25 , Roger Hui wrote:
> >> Lambda considered harmful?  LOL
> >
> > No, sigma considered harmful.  In conventional notation there's big sigma
> > for summation and big pi for product.  But how do you do max insert (>./)?
> > Min insert (<./)? And insert (^./)?  Etc.
> >
> > Infinite series (products, etc.) best done by having infinite vectors.  See
> > *Remembering Eugene
> > McDonnell*<http://www.jsoftware.com/papers/eem/eemapl2010.htm>
> >
> >      i. 4
> >   0 1 2 3
> >
> >      i. _
> >   0 1 2 3 4 5 ...
> >
> >      +/ 3 ^ - i. _
> >   1.5
> >
> >
> > and *Bring Something Beautiful* <http://archive.vector.org.uk/art10500390> .
> >
> >
> > On Fri, Dec 21, 2012 at 11:08 PM, Alex Giannakopoulos <
> > aegean at blueyonder.co.uk> wrote:
> >
> >> Very nice, Linda, thanks.
> >> That's just the example I needed.
> >>
> >> I think I'm beginning to get the 'geist' of it now!
> >>
> >> (Lambda considered harmful?  LOL)
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